I just did this today but I have a drdt-2. I did have to make a tower for the female die so the skin would fit around the drdt.
That said, you could do the same thing without the drdt. Make a tower out of wood, I used some scrap poplar I had laying around. Make a “T” with two pieces of wood and screw them together. Put the T upside down and drill a hole for the die to fit in. I used 3/16”.
Place the upside down T on a solid surface and then lay the skin over it, lining up the hole. Use the male die and a light rap with a hammer will make the dimple. You only have to do 12 holes, so it should work fine.